Determination of standardized ileal digestible lysine requirement in growing turkey poults by different statistical methods

Shahir, Mohammad Hosein; Heidariniya, Afshin; Taheri, Hamidreza; Hoseini, Abdollah

doi:10.22059/jap.2013.36603

Determination of standardized ileal digestible lysine requirement in growing turkey poults by different statistical methods

Document Type : Research Paper

Authors

Mohammad Hosein Shahir ¹

Afshin Heidariniya ²

Hamidreza Taheri ¹

Abdollah Hoseini ³

¹ Assistant Professor, Department of animal science, University of Zanjan, Zanjan, Iran

² Ph.D student of poultry nutrition, Department of Animal Science, University of Zanjan, Zanjan, Iran

³ Assistant Professor, Animal Science Research Institute, Karaj, Iran

https://doi.org/10.22059/jap.2013.36603

Abstract

In order to determine the appropriate standardized ileal digestible (SID) lysine requirement in growing
male turkey poults (28-49 day of olds), one hundred sixty birds were used in a completely randomized
design with eight treatments (8 levels of SID lysine: 1.15 (basal diet), 1.225, 1.3, 1.375, 1.45, 1.525, 1.6,
1.675 percent) in 4 replicates of 5 birds. Increasing of SID lysine levels increased body weight gain and
decreased feed conversion ratio. Dietary treatment of 1.6 percent SID lysine had the highest body weight
gain and the lowest FCR compared to the basal diet (P<0.05). By using of broken line-linear ascending,
quadratic polynomial and broken line- quadratic ascending models, SID lysine requirements for weight
gain were 1.47±0.11, 1.57±0.04 and 1.49±0.05 and for FCR were 1.57±0.17, 1.61±0.02 and 1.59±0.08,
respectively. In conclusion, SID lysine requirements for body weight gain ranged between 1.47 to 1.57
and for FCR between 1.57 to 1.61 percent.

Keywords

broken line linear ascending

broken line quadratic ascending

lysine

Standardized ileal digestible

Quadratic polynomial

turkeys